Computer program

[S tucker]

I bought a used 2001 sierra slt 4x4 that was reprogrammed with a hypertech program. It wasn't done right on setup but I don't have the scanner tool that was originally used. My question is can I buy another programmer like sct or others and just start over ?

[shakenfake]

Probably not, I am assuming the hypertech has it locked down. Could be wrong though

[dsr611]

I think you would have to reset it back to factory settings (which would require the hypertech programmer)

[S tucker]

That's my problem,  when I bought the truck there was no programmer.  Thanks

[It's Tim]

 

[Jsdirt]

Without that programmer, the only thing you can do is have the ECU wiped and reprogrammed at a shop or mobile programmer that has a J-box. It's costs to get the required info from GM's website, plus the persons time, so you'll be into it for at least $200 I figure. Might be cheaper in AZ.

 

Either that or grab another one out of the boneyard (which might require programming anyway to get certain options to work), or, find one of those guys on eBay that'll sell you a used ECU, and they'll program your VIN and options into it prior to shipping it out.

 

What exactly was done wrong? Wrong axle ratio? That's about the only thing that'll screw up drivability with a Hypertech. Those things are so easy to use, a 4 year old could do it.

Edited January 17, 2022 by Jsdirt

[S tucker]

The transmission shift points are way off and it hits Rev limiter causing it to cut out. I'm not sure what parameters everything is set for.

[Jsdirt]

Gotcha. They set the shift points way too high. On a stock engine, they should be set at 5,500 RPM. 

 

Mine shifted there with the stock trans. With the modified trans I now have it shifts around 5,300 or so.

[KARNUT]

I would e-mail hypertech and seek their advice. I’ve had hand helds on my truck since they were available. Probably all the brands. They all stored the original program and added theirs. Before I spent any money I’d email them. 

[S tucker]

On WOT it is cutting out at 6000 and I don't like those results if you know what I mean....lol

[Jsdirt]

It says right in the directions that they can't help you without the original programmer, if I remember right. I'll take a look at it again in a bit here.

 

[S tucker]

1 minute ago, KARNUT said:

I would e-mail hypertech and seek their advice. I’ve had hand helds on my truck since they were available. Probably all the brands. They all stored the original program and added theirs. Before I spent any money I’d email them. 

I will try that. Thanks

[Jsdirt]

You need the actual unit in order to return the computer to stock. Without it, your only option is to reprogram your existing computer at a garage, or tuner shop.

 

https://postimg.cc/CZjf2FkY

 

[S tucker]

Ok, That sucks but what can I do. I appreciate your time.

[KARNUT]

13 minutes ago, Jsdirt said:

Gotcha. They set the shift points way too high. On a stock engine, they should be set at 5,500 RPM. 

 

Mine shifted there with the stock trans. With the modified trans I now have it shifts around 5,300 or so.

I use to program to the redline then back a-bit I believe 5900. Then 50 percent TM and their premium engine tune. I can’t imagine a can tune jacking up that bad as he described. Unless a drastic tire size change?